[Draft] New endpoints to manage recorded run configurations

[craig-willis]

See whole-tale/ngx-dashboard#122

Requirements:

• Revised based on 6/14/2021 dev call:
  • Initially a tale will have a single run configuration
  • The default run configuration will assume run.sh and no test
  • The user can edit the run configuration
• List run configurations for a tale
• Create a run configuration
• Edit a run configuration
• Delete a run configuration

Where run configuration consists of:

• Path to entrypoint script in tale (required)
• Path to test script (optional)